BOMwiki opens a free encyclopedia that maps every product to its constituent parts. The site catalogs 4,879 products, a total of 30,390,912 parts, and 192,471 items across 51 domains. An excavator example shows 639 parts in seven assemblies, each item traceable to a single screw or bearing.

The platform highlights how common components appear across industries. A fastener set shows up in 3,533 products, while a ball bearing links an espresso machine to an excavator in one click. The largest BOM, a 747‑class jet, rolls up to 5,643,733 parts, underscoring supply‑chain complexity.

BOMwiki also tracks raw materials. Refined indium, ABS resin, and bauxite ore link to just two products, while aluminum ingot appears in hundreds. This granular mapping helps engineers evaluate material footprints and traceability, offering a single source for parts reuse analysis.

With 51 domains ranging from aerospace to consumer electronics, the database serves designers, supply‑chain managers, and sustainability auditors. By exposing hidden dependencies, BOMwiki turns opaque assemblies into transparent, data‑driven structures that can streamline procurement and reduce waste for manufacturers and regulatory compliance.